concealment writes: "The report evaluates the challenge of curbing online radicalization from the perspective of supply and demand. It concludes that efforts to shut down websites that could serve as incubators for would-be terrorists--going after the supply--will ultimately be self-defeating, and that "filtering of Internet content is impractical in a free and open society."

"Approaches aimed at restricting freedom of speech and removing content from the Internet are not only the least desirable strategies, they are also the least effective," writes Peter Neumann, founding director of the International Centre for the Study of Radicalisation at King's College London and the author of the report.

Note to/. editors: I have editorialized the title to reflect actual interesting content, not the somewhat sensationalistic and generic original title."